Add four RS232 and four RS422/485 serial ports to your standard or low profile system through a PCIe slotThe PEX8S232485 8-Port PCIe Serial Combo Card lets you add four RS232 and four RS422 / RS485 serial ports to your PC through a single PCI Express expansion slot.This multi-port serial card is a single card solution that offers compatibility with nearly any serial communication protocol, supporting RS-232, RS-422, RS-485 2-wire or RS-485 4-wire operating modes at data rates up to 460Kbps.To fit most standard computer cases, the card ships with a standard profile bracket installed and includes a low-profile / half-height bracket for adapting to slimline or small form factor systems. Plus, the included breakout cable helps to avoid cluttered connections.Backed by a StarTech.com lifetime warranty and free lifetime technical support.The StarTech.com Advantage- Communicate with multiple devices over mixed protocols with RS232, RS422 and RS485 compatibility- Fit almost any PC case with included low and full profile brackets- Avoid crowded connections with the included breakout cable